121120021021021 has 32 divisors (see below), whose sum is σ = 137801592548352. Its totient is φ = 105457800000000.

The previous prime is 121120021021019. The next prime is 121120021021031. The reversal of 121120021021021 is 120120120021121.

It is a cyclic number.

It is not a de Polignac number, because 121120021021021 - 2¹ = 121120021021019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121120021020986 and 121120021021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120021021031) 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, 81265521 + ... + 82742521.

It is an arithmetic number, because the mean of its divisors is an integer number (4306299767136).

Almost surely, 2^{121120021021021} is an apocalyptic number.

121120021021021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121120021021021 is a deficient number, since it is larger than the sum of its proper divisors (16681571527331).

121120021021021 is a wasteful number, since it uses less digits than its factorization.

121120021021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479525.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121120021021021 its reverse (120120120021121), we get a palindrome (241240141042142).

The spelling of 121120021021021 in words is "one hundred twenty-one trillion, one hundred twenty billion, twenty-one million, twenty-one thousand, twenty-one".