10212099981 has 32 divisors (see below), whose sum is σ = 14535106560. Its totient is φ = 6362678784.

The previous prime is 10212099979. The next prime is 10212099983. The reversal of 10212099981 is 18999021201.

It is an interprime number because it is at equal distance from previous prime (10212099979) and next prime (10212099983).

It is not a de Polignac number, because 10212099981 - 2¹ = 10212099979 is a prime.

It is a super-2 number, since 2×10212099981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212099983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2180200 + ... + 2184878.

It is an arithmetic number, because the mean of its divisors is an integer number (454222080).

Almost surely, 2^10212099981 is an apocalyptic number.

It is an amenable number.

10212099981 is a deficient number, since it is larger than the sum of its proper divisors (4323006579).

10212099981 is a wasteful number, since it uses less digits than its factorization.

10212099981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5425.

The product of its (nonzero) digits is 23328, while the sum is 42.

The spelling of 10212099981 in words is "ten billion, two hundred twelve million, ninety-nine thousand, nine hundred eighty-one".