10213121040 has 80 divisors (see below), whose sum is σ = 31697429568. Its totient is φ = 2720337408.

The previous prime is 10213121029. The next prime is 10213121047. The reversal of 10213121040 is 4012131201.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is not an unprimeable number, because it can be changed into a prime (10213121047) 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, 186219 + ... + 234741.

Almost surely, 2^10213121040 is an apocalyptic number.

10213121040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10213121040 is an abundant number, since it is smaller than the sum of its proper divisors (21484308528).

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

10213121040 is a wasteful number, since it uses less digits than its factorization.

10213121040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49416 (or 49410 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 10213121040 its reverse (4012131201), we get a palindrome (14225252241).

The spelling of 10213121040 in words is "ten billion, two hundred thirteen million, one hundred twenty-one thousand, forty".