212510401642 has 32 divisors (see below), whose sum is σ = 397485532800. Its totient is φ = 82783034880.

The previous prime is 212510401633. The next prime is 212510401643. The reversal of 212510401642 is 246104015212.

It is a self number, because there is not a number n which added to its sum of digits gives 212510401642.

It is not an unprimeable number, because it can be changed into a prime (212510401643) 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, 886158 + ... + 1100134.

It is an arithmetic number, because the mean of its divisors is an integer number (12421422900).

Almost surely, 2^212510401642 is an apocalyptic number.

212510401642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212510401642 is a deficient number, since it is larger than the sum of its proper divisors (184975131158).

212510401642 is a wasteful number, since it uses less digits than its factorization.

212510401642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220446.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 212510401642 its reverse (246104015212), we get a palindrome (458614416854).

The spelling of 212510401642 in words is "two hundred twelve billion, five hundred ten million, four hundred one thousand, six hundred forty-two".