121120220021020 has 48 divisors (see below), whose sum is σ = 277558765797600. Its totient is φ = 44030485790720.

The previous prime is 121120220021011. The next prime is 121120220021029. The reversal of 121120220021020 is 20120022021121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121120220021011) and next prime (121120220021029).

It is a junction number, because it is equal to n+sod(n) for n = 121120220020985 and 121120220021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120220021029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81957085 + ... + 83421844.

It is an arithmetic number, because the mean of its divisors is an integer number (5782474287450).

Almost surely, 2^{121120220021020} is an apocalyptic number.

121120220021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121120220021020 is an abundant number, since it is smaller than the sum of its proper divisors (156438545776580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121120220021020 is a wasteful number, since it uses less digits than its factorization.

121120220021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165382278 (or 165382276 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121120220021020 its reverse (20120022021121), we get a palindrome (141240242042141).

The spelling of 121120220021020 in words is "one hundred twenty-one trillion, one hundred twenty billion, two hundred twenty million, twenty-one thousand, twenty".