1506212121051 has 80 divisors (see below), whose sum is σ = 2599737988320. Its totient is φ = 858899358720.

The previous prime is 1506212121049. The next prime is 1506212121061. The reversal of 1506212121051 is 1501212126051.

It is a happy number.

1506212121051 is a `hidden beast` number, since 1 + 5 + 0 + 621 + 21 + 2 + 10 + 5 + 1 = 666.

It is not a de Polignac number, because 1506212121051 - 2¹ = 1506212121049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1506212121061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 57500065 + ... + 57526253.

It is an arithmetic number, because the mean of its divisors is an integer number (32496724854).

Almost surely, 2^{1506212121051} is an apocalyptic number.

1506212121051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1506212121051 is a deficient number, since it is larger than the sum of its proper divisors (1093525867269).

1506212121051 is a wasteful number, since it uses less digits than its factorization.

1506212121051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30026 (or 30017 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The spelling of 1506212121051 in words is "one trillion, five hundred six billion, two hundred twelve million, one hundred twenty-one thousand, fifty-one".