1023100021021 has 16 divisors (see below), whose sum is σ = 1119303480960. Its totient is φ = 929444322240.

The previous prime is 1023100020931. The next prime is 1023100021081. The reversal of 1023100021021 is 1201200013201.

It is a cyclic number.

It is not a de Polignac number, because 1023100021021 - 2⁷ = 1023100020893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1023100020992 and 1023100021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023100021081) 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, 464766 + ... + 1504063.

It is an arithmetic number, because the mean of its divisors is an integer number (69956467560).

Almost surely, 2^{1023100021021} is an apocalyptic number.

It is an amenable number.

1023100021021 is a deficient number, since it is larger than the sum of its proper divisors (96203459939).

1023100021021 is a wasteful number, since it uses less digits than its factorization.

1023100021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969476.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1023100021021 its reverse (1201200013201), we get a palindrome (2224300034222).

The spelling of 1023100021021 in words is "one trillion, twenty-three billion, one hundred million, twenty-one thousand, twenty-one".