2121069477 has 16 divisors (see below), whose sum is σ = 2858518080. Its totient is φ = 1398874752.

The previous prime is 2121069403. The next prime is 2121069479. The reversal of 2121069477 is 7749601212.

It is not a de Polignac number, because 2121069477 - 2²⁴ = 2104292261 is a prime.

It is a super-2 number, since 2×2121069477² = 8997871452522107058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121069479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218593 + ... + 228089.

It is an arithmetic number, because the mean of its divisors is an integer number (178657380).

Almost surely, 2^2121069477 is an apocalyptic number.

It is an amenable number.

2121069477 is a deficient number, since it is larger than the sum of its proper divisors (737448603).

2121069477 is a wasteful number, since it uses less digits than its factorization.

2121069477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10292.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 2121069477 is about 46055.0700466300. The cubic root of 2121069477 is about 1284.8476408962.

The spelling of 2121069477 in words is "two billion, one hundred twenty-one million, sixty-nine thousand, four hundred seventy-seven".