121111002111021 has 32 divisors (see below), whose sum is σ = 174330394818048. Its totient is φ = 74346892139520.

The previous prime is 121111002110983. The next prime is 121111002111031. The reversal of 121111002111021 is 120111200111121.

It is not a de Polignac number, because 121111002111021 - 2⁶ = 121111002110957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111002111031) 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, 23681580 + ... + 28337946.

It is an arithmetic number, because the mean of its divisors is an integer number (5447824838064).

Almost surely, 2^{121111002111021} is an apocalyptic number.

It is an amenable number.

121111002111021 is a deficient number, since it is larger than the sum of its proper divisors (53219392707027).

121111002111021 is a wasteful number, since it uses less digits than its factorization.

121111002111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4658021.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121111002111021 its reverse (120111200111121), we get a palindrome (241222202222142).

The spelling of 121111002111021 in words is "one hundred twenty-one trillion, one hundred eleven billion, two million, one hundred eleven thousand, twenty-one".