121020120221210 has 64 divisors (see below), whose sum is σ = 252472438577664. Its totient is φ = 40906533427200.

The previous prime is 121020120221201. The next prime is 121020120221219. The reversal of 121020120221210 is 12122021020121.

It is an interprime number because it is at equal distance from previous prime (121020120221201) and next prime (121020120221219).

It is a super-2 number, since 2×121020120221210² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121020120221219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123927650 + ... + 124900370.

It is an arithmetic number, because the mean of its divisors is an integer number (3944881852776).

Almost surely, 2^{121020120221210} is an apocalyptic number.

121020120221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121020120221210 is an abundant number, since it is smaller than the sum of its proper divisors (131452318356454).

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

121020120221210 is a wasteful number, since it uses less digits than its factorization.

121020120221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997839.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121020120221210 its reverse (12122021020121), we get a palindrome (133142141241331).

The spelling of 121020120221210 in words is "one hundred twenty-one trillion, twenty billion, one hundred twenty million, two hundred twenty-one thousand, two hundred ten".