1051712121506 has 4 divisors (see below), whose sum is σ = 1577568182262. Its totient is φ = 525856060752.

The previous prime is 1051712121479. The next prime is 1051712121529. The reversal of 1051712121506 is 6051212171501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 695237448481 + 356474673025 = 833809^2 + 597055^2 .

It is a super-2 number, since 2×1051712121506² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262928030375 + ... + 262928030378.

Almost surely, 2^{1051712121506} is an apocalyptic number.

1051712121506 is a deficient number, since it is larger than the sum of its proper divisors (525856060756).

1051712121506 is an equidigital number, since it uses as much as digits as its factorization.

1051712121506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525856060755.

The product of its (nonzero) digits is 4200, while the sum is 32.

The spelling of 1051712121506 in words is "one trillion, fifty-one billion, seven hundred twelve million, one hundred twenty-one thousand, five hundred six".