1213988057684 has 6 divisors (see below), whose sum is σ = 2124479100954. Its totient is φ = 606994028840.

The previous prime is 1213988057657. The next prime is 1213988057729. The reversal of 1213988057684 is 4867508893121.

It can be written as a sum of positive squares in only one way, i.e., 1128753255184 + 85234802500 = 1062428^2 + 291950^2 .

It is a super-2 number, since 2×1213988057684² (a number of 25 digits) contains 22 as substring.

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, 151748507207 + ... + 151748507214.

It is an arithmetic number, because the mean of its divisors is an integer number (354079850159).

It is a 1-persistent number, because it is pandigital, but 2⋅1213988057684 = 2427976115368 is not.

Almost surely, 2^{1213988057684} is an apocalyptic number.

It is an amenable number.

1213988057684 is a deficient number, since it is larger than the sum of its proper divisors (910491043270).

1213988057684 is a wasteful number, since it uses less digits than its factorization.

1213988057684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303497014425 (or 303497014423 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 62.

The spelling of 1213988057684 in words is "one trillion, two hundred thirteen billion, nine hundred eighty-eight million, fifty-seven thousand, six hundred eighty-four".