2051161221210 has 32 divisors (see below), whose sum is σ = 4938316250112. Its totient is φ = 545250845760.

The previous prime is 2051161221209. The next prime is 2051161221211. The reversal of 2051161221210 is 121221611502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2051161221209) and next prime (2051161221211).

It is not an unprimeable number, because it can be changed into a prime (2051161221211) 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, 107832826 + ... + 107851845.

It is an arithmetic number, because the mean of its divisors is an integer number (154322382816).

Almost surely, 2^{2051161221210} is an apocalyptic number.

2051161221210 is an abundant number, since it is smaller than the sum of its proper divisors (2887155028902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2051161221210 is a wasteful number, since it uses less digits than its factorization.

2051161221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215684998.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 2051161221210 its reverse (121221611502), we get a palindrome (2172382832712).

The spelling of 2051161221210 in words is "two trillion, fifty-one billion, one hundred sixty-one million, two hundred twenty-one thousand, two hundred ten".