121010021121 has 32 divisors (see below), whose sum is σ = 183887003520. Its totient is φ = 70109312000.

The previous prime is 121010021087. The next prime is 121010021123. The reversal of 121010021121 is 121120010121.

It is a cyclic number.

It is not a de Polignac number, because 121010021121 - 2⁹ = 121010020609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121010021097 and 121010021106.

It is not an unprimeable number, because it can be changed into a prime (121010021123) 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, 529320 + ... + 722633.

It is an arithmetic number, because the mean of its divisors is an integer number (5746468860).

Almost surely, 2^121010021121 is an apocalyptic number.

121010021121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121010021121 is a deficient number, since it is larger than the sum of its proper divisors (62876982399).

121010021121 is a wasteful number, since it uses less digits than its factorization.

121010021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252097.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121010021121 its reverse (121120010121), we get a palindrome (242130031242).

The spelling of 121010021121 in words is "one hundred twenty-one billion, ten million, twenty-one thousand, one hundred twenty-one".