121020011211021 has 16 divisors (see below), whose sum is σ = 173780453165760. Its totient is φ = 74470369034880.

The previous prime is 121020011210983. The next prime is 121020011211041. The reversal of 121020011211021 is 120112110020121.

It is a happy number.

It is not a de Polignac number, because 121020011211021 - 2¹⁰ = 121020011209997 is a prime.

It is a super-2 number, since 2×121020011211021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020011211041) 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, 71739240 + ... + 73406801.

It is an arithmetic number, because the mean of its divisors is an integer number (10861278322860).

Almost surely, 2^{121020011211021} is an apocalyptic number.

It is an amenable number.

121020011211021 is a deficient number, since it is larger than the sum of its proper divisors (52760441954739).

121020011211021 is a wasteful number, since it uses less digits than its factorization.

121020011211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145167436.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121020011211021 its reverse (120112110020121), we get a palindrome (241132121231142).

The spelling of 121020011211021 in words is "one hundred twenty-one trillion, twenty billion, eleven million, two hundred eleven thousand, twenty-one".