1211001022000 has 160 divisors (see below), whose sum is σ = 3650743908864. Its totient is φ = 377454816000.

The previous prime is 1211001021959. The next prime is 1211001022001. The reversal of 1211001022000 is 2201001121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1211001022001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3777822 + ... + 4085821.

Almost surely, 2^{1211001022000} is an apocalyptic number.

1211001022000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211001022000 is an abundant number, since it is smaller than the sum of its proper divisors (2439742886864).

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

1211001022000 is a wasteful number, since it uses less digits than its factorization.

1211001022000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7863684 (or 7863668 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1211001022000 its reverse (2201001121), we get a palindrome (1213202023121).

The spelling of 1211001022000 in words is "one trillion, two hundred eleven billion, one million, twenty-two thousand".