121211020011020 has 48 divisors (see below), whose sum is σ = 261277525043136. Its totient is φ = 47217407520000.

The previous prime is 121211020010947. The next prime is 121211020011041. The reversal of 121211020011020 is 20110020112121.

It is a super-2 number, since 2×121211020011020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121211020010986 and 121211020011004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491724776 + ... + 491971215.

It is an arithmetic number, because the mean of its divisors is an integer number (5443281771732).

Almost surely, 2^{121211020011020} is an apocalyptic number.

121211020011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121211020011020 is an abundant number, since it is smaller than the sum of its proper divisors (140066505032116).

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

121211020011020 is a wasteful number, since it uses less digits than its factorization.

121211020011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983696162 (or 983696160 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121211020011020 its reverse (20110020112121), we get a palindrome (141321040123141).

The spelling of 121211020011020 in words is "one hundred twenty-one trillion, two hundred eleven billion, twenty million, eleven thousand, twenty".