10101021994 has 12 divisors (see below), whose sum is σ = 17625252834. Its totient is φ = 4329009384.

The previous prime is 10101021961. The next prime is 10101022007. The reversal of 10101021994 is 49912010101.

It can be written as a sum of positive squares in only one way, i.e., 5763087225 + 4337934769 = 75915^2 + 65863^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51535729 + ... + 51535924.

Almost surely, 2^10101021994 is an apocalyptic number.

10101021994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

10101021994 is a deficient number, since it is larger than the sum of its proper divisors (7524230840).

10101021994 is a wasteful number, since it uses less digits than its factorization.

10101021994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103071669 (or 103071662 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 10101021994 in words is "ten billion, one hundred one million, twenty-one thousand, nine hundred ninety-four".