10123209990 has 48 divisors (see below), whose sum is σ = 27031715568. Its totient is φ = 2626561728.

The previous prime is 10123209989. The next prime is 10123210067. The reversal of 10123209990 is 9990232101.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1516672 + ... + 1523331.

It is an arithmetic number, because the mean of its divisors is an integer number (563160741).

Almost surely, 2^10123209990 is an apocalyptic number.

10123209990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10123209990 is an abundant number, since it is smaller than the sum of its proper divisors (16908505578).

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

10123209990 is a wasteful number, since it uses less digits than its factorization.

10123209990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040053 (or 3040050 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

It can be divided in two parts, 10 and 123209990, that added together give a square (123210000 = 11100²).

The spelling of 10123209990 in words is "ten billion, one hundred twenty-three million, two hundred nine thousand, nine hundred ninety".