2001213201455 has 16 divisors (see below), whose sum is σ = 2738311640064. Its totient is φ = 1390888450560.

The previous prime is 2001213201437. The next prime is 2001213201461. The reversal of 2001213201455 is 5541023121002.

It is not a de Polignac number, because 2001213201455 - 2¹² = 2001213197359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905525231 + ... + 905527440.

It is an arithmetic number, because the mean of its divisors is an integer number (171144477504).

Almost surely, 2^{2001213201455} is an apocalyptic number.

2001213201455 is a deficient number, since it is larger than the sum of its proper divisors (737098438609).

2001213201455 is a wasteful number, since it uses less digits than its factorization.

2001213201455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811052706.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 2001213201455 its reverse (5541023121002), we get a palindrome (7542236322457).

The spelling of 2001213201455 in words is "two trillion, one billion, two hundred thirteen million, two hundred one thousand, four hundred fifty-five".