10151221020 has 24 divisors (see below), whose sum is σ = 28423419024. Its totient is φ = 2706992256.

The previous prime is 10151220997. The next prime is 10151221043. The reversal of 10151221020 is 2012215101.

It is an interprime number because it is at equal distance from previous prime (10151220997) and next prime (10151221043).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84593449 + ... + 84593568.

It is an arithmetic number, because the mean of its divisors is an integer number (1184309126).

Almost surely, 2^10151221020 is an apocalyptic number.

10151221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10151221020 is an abundant number, since it is smaller than the sum of its proper divisors (18272198004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10151221020 is a wasteful number, since it uses less digits than its factorization.

10151221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169187029 (or 169187027 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 10151221020 its reverse (2012215101), we get a palindrome (12163436121).

The spelling of 10151221020 in words is "ten billion, one hundred fifty-one million, two hundred twenty-one thousand, twenty".