138721257061022 has 32 divisors (see below), whose sum is σ = 221362370208000. Its totient is φ = 64972471269888.

The previous prime is 138721257061003. The next prime is 138721257061063. The reversal of 138721257061022 is 220160752127831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29901104 + ... + 34227452.

It is an arithmetic number, because the mean of its divisors is an integer number (6917574069000).

Almost surely, 2^{138721257061022} is an apocalyptic number.

138721257061022 is a deficient number, since it is larger than the sum of its proper divisors (82641113146978).

138721257061022 is a wasteful number, since it uses less digits than its factorization.

138721257061022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330820.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 138721257061022 in words is "one hundred thirty-eight trillion, seven hundred twenty-one billion, two hundred fifty-seven million, sixty-one thousand, twenty-two".