21167061202036 has 6 divisors (see below), whose sum is σ = 37042357103570. Its totient is φ = 10583530601016.

The previous prime is 21167061202013. The next prime is 21167061202069. The reversal of 21167061202036 is 63020216076112.

It can be written as a sum of positive squares in only one way, i.e., 18642585102436 + 2524476099600 = 4317706^2 + 1588860^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21167061201986 and 21167061202004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2645882650251 + ... + 2645882650258.

Almost surely, 2^{21167061202036} is an apocalyptic number.

It is an amenable number.

21167061202036 is a deficient number, since it is larger than the sum of its proper divisors (15875295901534).

21167061202036 is a wasteful number, since it uses less digits than its factorization.

21167061202036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5291765300513 (or 5291765300511 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

Adding to 21167061202036 its reverse (63020216076112), we get a palindrome (84187277278148).

The spelling of 21167061202036 in words is "twenty-one trillion, one hundred sixty-seven billion, sixty-one million, two hundred two thousand, thirty-six".