690021110121 has 32 divisors (see below), whose sum is σ = 1054449911808. Its totient is φ = 393178250880.

The previous prime is 690021110117. The next prime is 690021110153. The reversal of 690021110121 is 121011120096.

It is a happy number.

It is not a de Polignac number, because 690021110121 - 2² = 690021110117 is a prime.

It is a super-2 number, since 2×690021110121² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 690021110091 and 690021110100.

It is not an unprimeable number, because it can be changed into a prime (690021110101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12019716 + ... + 12076986.

It is an arithmetic number, because the mean of its divisors is an integer number (32951559744).

Almost surely, 2^690021110121 is an apocalyptic number.

It is an amenable number.

690021110121 is a deficient number, since it is larger than the sum of its proper divisors (364428801687).

690021110121 is a wasteful number, since it uses less digits than its factorization.

690021110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58901.

The product of its (nonzero) digits is 216, while the sum is 24.

The spelling of 690021110121 in words is "six hundred ninety billion, twenty-one million, one hundred ten thousand, one hundred twenty-one".