1021121252031 has 16 divisors (see below), whose sum is σ = 1394734063968. Its totient is φ = 664128729600.

The previous prime is 1021121251981. The next prime is 1021121252057. The reversal of 1021121252031 is 1302521211201.

It is not a de Polignac number, because 1021121252031 - 2⁷ = 1021121251903 is a prime.

It is a super-2 number, since 2×1021121252031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021121251989 and 1021121252007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021121252131) 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, 8367505 + ... + 8488661.

It is an arithmetic number, because the mean of its divisors is an integer number (87170878998).

Almost surely, 2^{1021121252031} is an apocalyptic number.

1021121252031 is a deficient number, since it is larger than the sum of its proper divisors (373612811937).

1021121252031 is a wasteful number, since it uses less digits than its factorization.

1021121252031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189722.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 1021121252031 its reverse (1302521211201), we get a palindrome (2323642463232).

The spelling of 1021121252031 in words is "one trillion, twenty-one billion, one hundred twenty-one million, two hundred fifty-two thousand, thirty-one".